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Increasing the talk-time of mobile radios with efficient linear transmitter architectures

S. Mann, J. McGeehan, M. Beach, P. Warr
2001 Electronics & communication engineering journal  
For GSM EDGE and TETRA modulation it is shown that to obtain a transmitter efficiency (of >50%) the PA needs to be biased as class-C.  ...  It is shown that the PA efficiency for a transmitter operating backed-off (under power control), has a marginal impact on the talk-time and that the effect is largest at high output powers.  ...  Section 5 discusses the results of section 4 and suggests using hybrid architectures as a way forward to achieve a highly efficient linear transmitter. Section 7 concludes this paper.  ... 
doi:10.1049/ecej:20010204 fatcat:qqts4n4xgrfondhhufvw2upe4y

Performance Analysis of Multiradio Transmitter with Polar or Cartesian Architectures Associated with High Efficiency Switched-Mode Power Amplifiers (invited paper))

F. Robert, A. Diet, M. Suarez, M. Villegas, G. Baudoin
2010 Radioengineering  
This paper investigates the interest of these architectures for a multiradio transmitter able to support existing wireless communications standards between 800 MHz and 6 GHz.  ...  The concept of a unique multiradio architecture is an evolution of the multistandard transceiver characterized by a parallelization of circuits for each standard.  ...  A general question for CEAS architectures is the bandwidth B of the output RF bandpass filter signal to consider.  ... 
doaj:2efb07c8a35047a29bedf5f045351ea5 fatcat:i3lz2yjcingcpl5tq25ei3suiy

Mobile WiMAX Handset Front-End: Design Aspects and Challenges [chapter]

Vaclav Valenta, Genevieve Baudoin, Antoine Diet, Roman Marsalek, Fabien Robert, Martha Suarez, Martine Villegas
2009 WIMAX New Developments  
A WiMAX transmitter architecture must meet design constraints of: providing high efficiency and linearity for a wideband OFDM (the bandwidth can be up to 100 MHz) and high Peak to Average Power Ratio (  ...  CALLUM is an interesting architecture but presents a possibility of instability and additional costs of realisation.  ... 
doi:10.5772/8263 fatcat:3gm7z5trd5f37igxaptnnxym6e

RF Transmitter Architectures for Nomadic Multi-radio: A Review of the Evolution Towards Fully Digital Solutions

Antoine Diet, Fabien Robert, Genevieve Baudoin, Martine Villegas, Philippe Cathelin, Pascal Triaire, Ajib Bahi
2013 Recent Patents on Electrical & Electronic Engineering e  
The conception of fully digital architectures is discussed in that idea. Our work in this domain is presented as a contribution in the study of transmitter architecture for multi-radio.  ...  In this paper, a review of the major evolution steps of mobile transmitter architectures is summarized.  ...  ACKNOWLEDGEMENTS The authors acknowledge ST Microelectronics for the realization and measures of the active filter.  ... 
doi:10.2174/22131116113069990006 fatcat:usf2bgwwmvax3lrqnn46il64n4

Envelope Factorization with Partial Elimination and Recombination, EF-PER, a New Linear RF Architecture

A. Diet, G. Baudoin, S. Lasaulce
2015 Radioengineering  
In this paper, a new architecture for efficient linear radio frequency transmitters is proposed; it includes envelope-tracking (ET) and envelope-elimination-andrestoration (EER) architectures as special  ...  Compared to ET or EER architectures, the parameter "α" constitutes a new degree of freedom.  ...  architecture and the PA design at the same time (LINC/CALLUM, EER, ET).  ... 
doi:10.13164/re.2015.0993 fatcat:7ujybfdlq5gtpcx6t57wbfz42i

Radio-Communications Architectures [chapter]

Antoine Diet, Martine Villegas, Genevieve Baudoin, Fabien Robert
2010 Radio Communications  
Multi-radio is interpreted as a possible reconfigurable architecture for most of the signals presented (mainly NB-CW and WB-CW). This helps drive improvements on classic structures.  ...  Basic elements and their imperfections Transceiver architectures for radio-communications signals is defined from the Digital to Analog Converter (DACs, in the baseband section) to the transmitter (Tx)  ...  This chapter focuses on the transmitter, yet some considerations about the receiver are given.  ... 
doi:10.5772/9469 fatcat:5du2xugg3red3auromiefgt74q

Gain and phase error-free LINC transmitter

Xuejun Zhang, L.E. Larson
2000 IEEE Transactions on Vehicular Technology  
This paper presents a new correction technique for linear amplification with nonlinear components transmitters.  ...  Analytical results and simulations demonstrate that this system is sufficient to suppress the out-of-band spectrum for mobile communications.  ...  The advantage of this approach is that each amplifier can be operated in a very power-efficient mode, and the final output can be highly linear and free of intermodulation-a key consideration for bandwidth-efficient  ... 
doi:10.1109/25.892600 fatcat:gxsrp6ap5zfmzgqtslf5ckfzfu

Linearization of radio frequency amplifiers using nonlinear Internal Model Control method

S. Bachir, C. Duvanaud
2011 AEU - International Journal of Electronics and Communications  
The IMC is based on the description of a process model and of a controller. It is shown that baseband frequency descriptions are suitable for the model and the controller.  ...  The control loop is augmented by a block filter R(s), so-called the IMC controller. In this structure, s denotes a Laplace operator for continuous time-domain consideration.  ...  Whereas, the IMC system allows to improve the nonlinear performances for the whole bandwidth considered.  ... 
doi:10.1016/j.aeue.2010.07.004 fatcat:pxttcz5c7vasrjemo36bo4po2i

Design of a Miniaturized Wireless Blood Pressure Sensing Interface Using Capacitive Coupling

Ammar Aldaoud, Callum Laurenson, Francois Rivet, Mehmet R. Yuce, Jean-Michel Redoute
2015 IEEE/ASME transactions on mechatronics  
Designed for a bit length of 6.4 μs, the average power consumption of the device has been measured to be 20.5 μW and 2.85 mW in air and phantom material, respectively.  ...  The miniaturized sensor interface circuit consists of two plates with a diameter of 2.5 cm, which are connected by means of a thin wire; the device's maximum thickness is 5 mm.  ...  Linzer, and A. Linzner from the Department of Electrical and Computer Systems Engineering, Monash University, Melbourne, Australia, for their help in manufacturing the prototype and setup.  ... 
doi:10.1109/tmech.2014.2322614 fatcat:xuyr5ylchvexlhtz3qbkqn6k4m

Power efficiencies of linear transmitter architectures for handportable, satellite communications

A. Mansell
1995 IEE Colloquium on Evolving Technologies for Small Earth Station Hardware   unpublished
linear transmitter architectures The provision of a linear transmit section within a mobile transceiver facilitates the use of arbitrarily amplitude-and -phase modulated signaling, potentially resulting  ...  This paper highlights some relevant narrowband, linear transmitter architectures appropriate to satellite handportable and mobile transceivers, and attempts to quantify their relative merits in terms of  ...  Acknowledgements The authors gratefully acknowledge their colleagues in the Centre for Communications Research, University of Bristol, who have studied linear transmitter design for a number of years.  ... 
doi:10.1049/ic:19950232 fatcat:6nqdypyojzb2dm73ssydvwkqiy

Gain/phase imbalance-minimization techniques for LINC transmitters

X. Zhang, L.E. Larson, P.M. Asbeck, P. Nanawa
2001 IEEE transactions on microwave theory and techniques  
Two simple calibration schemes for the correction of the path imbalance in a linear amplification with nonlinear components (LINC) transmitter have been demonstrated.  ...  A prototype LINC system has been tested for CDMA IS-95 baseband input, and 38 and 35-dBc adjacent channel interference were achieved for the foreground and background schemes, respectively.  ...  The advantage of this approach is that each amplifier can be operated in a very power-efficient mode, and yet the final output can be highly linear and free of intermodulation-a key consideration for bandwidth  ... 
doi:10.1109/22.971643 fatcat:vlkyv23ctvcszfnhgp423sq7oa

LINEARIZATION OF RF POWER AMPLIFIERS USING ADAPTIVE KALMAN FILTERING ALGORITHM

SMAIL BACHIR, NICUSOR CALINOIU, CLAUDE DUVANAUD
2011 Journal of Circuits, Systems and Computers  
In this paper, a new linearization algorithm of Power Amplifier, based on Kalman filtering theory is proposed for obtaining fast convergence of the adaptive digital predistortion.  ...  Using digital signal processing, experimental results with commercial power amplifier are presented for multicarrier signals to demonstrate the effectiveness of this new approach.  ...  point of 28dBm for a CW signal.  ... 
doi:10.1142/s0218126611007724 fatcat:pmzz4sa3ozdnvlwjvmomzbt72i

Session and abstracts

2013 2013 38th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)  
Time-domain spectroscopy measurements show that a transmittance higher than 75 % is achieved over a bandwidth of 1 THz.  ...  We present a substrate integrated waveguide (SIW) antenna designed for 60 GHz indoor Radio-over-Fiber photonic transmitters.  ...  By substituting the vertical lateral walls for meander-lines it is possible to move the extraordinary transmission peak downward accompanied by an unprecedented enlargement of the fr actional bandwidth  ... 
doi:10.1109/irmmw-thz.2013.6665398 fatcat:cr2vloto55gh3bek773xl46q3a

Compromises in orchestra pit design: A ten‐year trench war in The Royal Theatre, Copenhagen

Anders Chr. Gade, Bo Mortensen
1998 Journal of the Acoustical Society of America  
Estimates of critical bandwidths in binaural experiments vary considerably across experimental conditions.  ...  In agreement with results from binaural experiments, the integration bandwidths increase considerably with masker level.  ...  Cross-linguistic evidence for the acquisition of accent by the onset of word use. Rory A. DePaolis, Marilyn M.  ... 
doi:10.1121/1.422278 fatcat:l4rayw2q4ja6demlq46irqfu4m

Simultaneous measurements of room‐acoustic parameters using different measuring equipment?

Tor Halmrast, Anders Gade, Bjorn Winsvold
1998 Journal of the Acoustical Society of America  
Estimates of critical bandwidths in binaural experiments vary considerably across experimental conditions.  ...  In agreement with results from binaural experiments, the integration bandwidths increase considerably with masker level.  ...  Cross-linguistic evidence for the acquisition of accent by the onset of word use. Rory A. DePaolis, Marilyn M.  ... 
doi:10.1121/1.422575 fatcat:fofoye2ypjho5nhhtqgr4fvczm
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